Heat exchanger

FIELD: power industry.

SUBSTANCE: heat exchanger includes casing with through openings on its opposite sides, phase transient working medium and heat carrier. Phase transient working medium is made in the form of frameless heat exchange elements from form-stable composite heat accumulating material, which are fixed inside casing with possibility of their being freely streamlined with heat carrier. In order to improve heat carrier to the space between adjacent heat exchange elements, elastic corrugated metal ribbed plates are installed. When using the heat exchanger as electric heating device, electric heaters are added to its composition.

EFFECT: improving mass and dimensions parameters of heat exchange devices at simultaneous increase of their power capacity, simplifying the design, increasing energy saving level and improving energy characteristics of the systems operating in peak actuation modes.

5 cl, 5 dwg

 

The invention relates to the field of heat and power system, and more particularly, to a regenerative thermal storage heat exchangers using a latent heat of phase transformations of the working fluid during its transition from a solid to a liquid state and back and the heat content of the working fluid that occurs with little change in terms of footprint. Devices of this kind are intended for use in various fields of national economy, including in thermal process used, life and other to save energy and improve the efficiency of equipment and thermal devices. For example, for removing peak thermal loads in electronic equipment, vehicles, household heating appliances in regions with irregular supply of electricity, as well as in industry for use of accumulated heat of the exhaust gases on plants and factories with the purpose of heating various areas of car bodies and other

A known design of the heat exchanger described in the book [1] on p.64. Inside the tense structure of cast-iron vessel for battery with hot coolant are numerous heat exchange elements (photoperiodism working body), namely a sealed capsule small, filled with a eutectic mixture of sole is - m-triphenylen. Each capsule provides free volume of the internal cavity filled molten working medium when charging the battery of the boiler. Coolant, water, washes the outer surface of the sealed capsules.

Also known heat exchanger described in the book [1] on str. This system of accumulation based on the use of the heat of phase transition, which represents a tank with a removable lid, filled photoperiodic thermal storage medium hydrate of Na2S2O3·5H2O or MgCl2·6H2O (otherwise the heat storage body work), inside of which is placed a plastic heat exchange elements, which are tubes with circulating coolant - water. There is shown a variant of the heat exchanger with finned annular channels with separate charging circuits and bit environments. Each heat exchanger element comprises inner and outer tubes, thermal contact between which is provided a longitudinal edges of the material with good thermal conductivity (aluminum). The annular space between the ribs filled with material, accumulating energy of the phase transition and heat the molten salt. In this embodiment, the system heat accumulation operates as a hybrid battery, which use the heat of phase I of the transition and the heat content of the working fluid.

The main disadvantages of the above structures are:

- deterioration of heat transfer between the working fluid and the coolant due to the presence of a separating wall between them;

- increase the weight and dimensions of heat exchangers because of the presence of the separating walls between the working fluid and the coolant;

- the necessity of sealing the volume of a working body to avoid pouring the molten mass of the working fluid and the associated increasing sophistication of filling the heat-exchange device body work;

- formation of gas cavities within the sealed volume of the heat exchange elements and the need to combat them.

Closest to the proposed invention is the heat exchanger described in str books [1] (RES). In this device, the heat transfer elements comprise a block of energy-accumulating rods of cylindrical shape made of polyethylene, inside which is placed posoperative working body - hydrate calcium chloride CaCl2·6H2O. Disadvantages of such a heat exchanger are all of the above referred to analogs of the invention.

Object of the invention is the elimination of shortcomings, including the failure from having sealing volume with photoperiodism working fluid, resulting numerous consequences of this procedure, including h is after the appearance of additional parasitic thermal resistance between the heat-accumulating the working fluid, and circulating the coolant, and on this basis a fundamental improvement in size, weight and power characteristics of heat exchangers and energy saving systems based on them.

Technical results of the invention are:

- improved mass and heat transfer characteristics of the devices while increasing their energy (heat) per unit volume and mass of the device.

- simplification of the structure;

- increased level of energy savings systems and improving the energy performance of systems running in peak mode on.

These technical results are achieved by the fact that in the known heat exchanger, containing a casing with a through Windows on opposite sides, posoperative working fluid and coolant, posoperative working body made in the form of open-frame heat exchangers from formoustoychivosti thermal storage composite material fixed inside the casing with the possibility of free flow of fluid.

Thus the heat transfer elements are body plate type with straight or curved side surfaces, the heat exchanger may be provided with a heat-conducting corrugated metal plates, placed in the flow of coolant so that they were tight agaty between adjacent heat exchange elements, in the casing on the side of the input window has an electric heater, and the inside or the outside of the heat exchange elements posted by electric heaters.

Figure 1 shows the General scheme of the heat exchanger.

Figure 2 shows the geometric shape of the planar heat-exchange elements, where h is the thickness of the heat transfer element.

Figure 3 shows a General view of the heat exchanger with an elastic corrugated plate to improve heat exchange with circulating through it cooled.

The design of the heat exchanger (1) comprises a casing (1) entrance (2) and outlet (3) for the fluid (4), injected from the outside, and open-frame heat exchangers (5), which is termoustoychivee working body.

The use of the device formoustoychivosti thermal storage composite working fluid that retains its shape during the transition from solid to liquid state and back, does not require sealing of the occupied volume, for example of the composition for heat-retaining material according to the patent of Russian Federation №2105025 from 27.09.1993 was allowed to be excluded from the heat exchanger elements with photoperiodism thermal storage working fluid separation wall between the coolant and called heat-retaining material. It is the absence of the above separation wall, the sealing amount of raboteg the body, and allowed to call heat-exchange planar elements, does not require sealing of the working fluid. This significantly improved size, weight and power characteristics of the heat transfer devices and energy-saving systems in General.

As a rule, formoustojchivy photoperiods composite heat storage materials have low thermal conductivity (typically up to λ<0.5 W/(m·K)). The latter imposes certain constraints on the design of the heat exchange elements, the temperature on the volume of which (in the proposed heat exchanger on the thickness of the element) should be minimized for optimum overall size and the required intensity of the heat exchanger.

To remove this restriction, the best configuration of the volume of the heat transfer element should recognize a flat plate form of limited thickness, since in this case thermal resistance h/λ of the heat transfer relative to the direction of the applied heat flux, where h and λ is the thickness and conductivity of the mass of the working fluid, the moving fluid to a working body is minimal. The dimensions of the elements in the other directions are not limited. As a first approximation to the desired thickness of the working fluid can be determined by calculation methods presented in the monograph [2], the claim is of UCA of heat balances the body (shell).

If you want to increase the intensity of heat exchange with coolant, then you should choose a more complex plate shape and dimensions of the elements, which improves the heat transfer between the surfaces of the elements and the heat carrier, such as a wavy surface, a surface with bumps and hollows trapezoidal or triangular in shape (figure 2). Resulting in increased heat transfer coefficient between the coolant and the surface of the working body.

When using heat-exchange elements in the form of a flat plate to improve heat transfer in the space between adjacent heat exchange elements are elastic corrugated metal ribbed plate (6) (figure 3) with good thermal conductivity, tightly pressed from both sides to the surface of your body, between which circulates coolant, providing the intense heat.

The proposed heat exchanger can be used for heating various kinds of residential and industrial premises with an uneven supply of electric power from independent sources, in the presence of night tariffs, in extreme cases. Then it is advantageous to perform the design of the device, by entering part of the heat exchanger elements with photoperiodism working fluid electric heaters, the charging system is we are heating. However, depending on the design of the heaters can be positioned within the volume fatpercentage working body or outside at the entrance of the device to heat the fluid during charging. Circuit heat exchangers for the two described heating systems is shown in figure 4 and 5, where (7) - electric heater. Providing heat transfer from the heat-accumulating the working fluid is carried out by direct blowing its outer surfaces by circulating coolant, for example, by using a fan.

We will show the principle of operation of the inventive heat exchanger energy-saving systems on the example of the use of exhaust gas heat.

The inventive device operates as follows (see figure 1 and 3). The exhaust air or other gas (4)heated industrial or process equipment, is discharged outside the occupied factory by means of a ventilation system, in which is embedded the heat exchanger. The air serves as a heat carrier passing through the device heats posoperative working body (5) and the contacting corrugated metal plate (6), if they exist. Upon reaching the working fluid, the phase transition temperature fusible filler of heat-retaining material (working body) begins to melt, the molten part of the volume continues to heat up, ategie - to raise its temperature to the phase transition. As a result, after a certain period of time, called the charging time, the working fluid reaches a preset allowable temperature, and the flow of hot fluid into the device stops. For example, formostly heat storage material according to the patent of Russian Federation №2105025 from 27.09.1993, retains its shape when heated to a temperature of about 190÷250°C. the temperature of the phase transition fusible filler this thermal storage composite material is 80°C. Next, a process of discharging - use of stored waste heat for preheating the other, the cold fluid at the entrance of the industrial equipment or for heating of adjacent areas and other needs.

When using the heat exchanger as the electrical heating device in an individual apartment and office heating and phase transition of the working fluid is performed by turning on the electric heater - charging mode to an acceptable temperature (see figure 4 and 5). During charging, the fan can be turned on or off. When the discharge fan should be included, since the heat removal of the stored thermal energy in the device is carried out by air from the heated heat-retaining material.

The sources and the formation

1. Beckman G., Gilli P. Thermal energy storage: TRANS. from English. Vasilieva, Evictoria; edited by Dr. of technical Sciences Prof. VSMPOAVISMA. M.: Mir, 1987.

2. Leningrad. Cooling of electronic equipment using consumable substances. M: Energy, 1975.

1. The heat exchanger containing the casing through the Windows on the opposite side, posoperative working fluid and coolant, characterized in that posoperative working body made in the form of open-frame heat exchangers from formoustoychivosti thermal storage composite material fixed inside the casing with the possibility of free flow of fluid.

2. The heat exchanger according to claim 1, characterized in that the heat exchange elements are body plate type with straight or curved side surfaces.

3. The heat exchanger according to claim 1, characterized in that its composition is introduced heat-conducting corrugated metal plates, placed in the flow of coolant so that they are tightly clamped between adjacent heat exchange elements.

4. The heat exchanger according to claim 1, characterized in that the casing on the side of the input window has an electric heater.

5. The heat exchanger according to claim 1, characterized in that the inside or outside of the heat exchange elements o f the s electric heaters.



 

Same patents:

FIELD: heating systems.

SUBSTANCE: invention is intended for water heating and can be used in power engineering. Device includes boiler, expansion tank, heat exchanger, hydraulic air heat exchanger, pipelines, including pipeline connecting the upper part of boiler to the bottom of expansion tank, safety valves, capacity and tank. Boiler, tank, expansion tank and pipeline connecting the upper part of boiler to bottom of expansion tank have common longitudinal axis in vertical plane, heat exchanger and capacity are coaxial, and their axis is parallel to axes of tank, pipeline connecting the upper part of boiler to bottom of expansion tank and expansion tank; at that, heat exchanger is connected through the cock to pipeline connecting the upper part of boiler to bottom of expansion tank; in space between boiler internal walls and external walls there located are heat energy sources and heat-accumulating matters.

EFFECT: invention provides use of heat of phase transition of heat-accumulating matter.

1 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to heat exchange devices used for heat or cold transfer in the processes using liquid or gas flows, and can be used in heating and ventilation systems, in chemical, food and other industries. Heat exchange method in gaseous and liquid media consists in transfer of heat or warm liquid (gas) from upper layers of medium to lower ones by means of capsules consisting of cover with heat insulation in which there is tank filled with heat-absorbing material or liquid (gas) and flotation chambers with movable partition brought into operation with temperature drive in the form of bi-material. Capsules are retained on bottom till heat transfer is completed owing to magnet or thermomagnetic material installed in capsule, and electric magnet installed in lower layers; at that, current for electric magnet is generated when capsule with magnet passes along current-conducting spiral located along capsule movement.

EFFECT: proposed invention will allow, by using internal heat, performing heat exchange between upper and lower layers of liquid (gas), as well as producing electric power.

5 cl, 8 dwg

FIELD: heat engineering, namely accumulator type gas heaters, possibly used at developing hot blast gas heaters for aerodynamic tubes.

SUBSTANCE: gas heater includes cylindrical heat accumulating adapter sealed in housing near end of gas outlet. Novelty is that heater includes rod arranged along axis of heat accumulating adapter, supporting grid and cylindrical gas-tight casing. Heat accumulating member of adapter is made of thin corrugated strip whose one end is secured to rod. Corrugated strip is twisted around rod in the form of compact coil arranged together with supporting grid in casing. Height of strip corrugation is equal to thickness of strip.

EFFECT: improved design of heater due to its lowered hydraulic resistance.

1 dwg

FIELD: heat engineering, namely accumulator of gas heaters, possibly used for constructing Cowper and ohmic gas heaters for aerodynamic tubes.

SUBSTANCE: heater includes heat accumulating adapter arranged in housing with gas-tight cylindrical outer surface and electric current supply leads of resistive heating member. Heat accumulating member of adapter is zigzag-shaped and it is made of thin strip of sheet material; said member has vertically arranged lamellae mutually spaced by the same distance and placed along axis of heater. Ends of said strip are connected to electric current leads. Annular mutually joined flanges are arranged on ends of adapter. The last has rods arranged between flanges on cylindrical surface; said rods are electrically isolated from flanges and they serve as supports for lamellae of heat accumulating member. Each flange of adapter has three parts (upper ring-half and two lower ring quadrants). There are gaps between parts of rings and casing for providing displacement of ring parts one relative to other and relative to casing by value of length change of lamellae of heat accumulating member at heating and cooling them.

EFFECT: enlarged using range of hot-blast heater due to its simplified design and lowered hydraulic resistance.

3 dwg

The invention relates to the field of electrical and heating equipment and can be used in various electrical heat exchangers and heating devices

The invention relates to heat-power engineering and heat engineering

The invention relates to a two-layer systems of accumulation of thermal energy, such as Solar energy, in which the absorption of heat is accumulating layer 24 and then through the heat-release layer 22 is transmitted to the consumer through a pipe 30

Electric heater // 2103618

The invention relates to energy, and in particular to equipment for heating of domestic and industrial premises

FIELD: heat engineering, namely accumulator of gas heaters, possibly used for constructing Cowper and ohmic gas heaters for aerodynamic tubes.

SUBSTANCE: heater includes heat accumulating adapter arranged in housing with gas-tight cylindrical outer surface and electric current supply leads of resistive heating member. Heat accumulating member of adapter is zigzag-shaped and it is made of thin strip of sheet material; said member has vertically arranged lamellae mutually spaced by the same distance and placed along axis of heater. Ends of said strip are connected to electric current leads. Annular mutually joined flanges are arranged on ends of adapter. The last has rods arranged between flanges on cylindrical surface; said rods are electrically isolated from flanges and they serve as supports for lamellae of heat accumulating member. Each flange of adapter has three parts (upper ring-half and two lower ring quadrants). There are gaps between parts of rings and casing for providing displacement of ring parts one relative to other and relative to casing by value of length change of lamellae of heat accumulating member at heating and cooling them.

EFFECT: enlarged using range of hot-blast heater due to its simplified design and lowered hydraulic resistance.

3 dwg

FIELD: heat engineering, namely accumulator type gas heaters, possibly used at developing hot blast gas heaters for aerodynamic tubes.

SUBSTANCE: gas heater includes cylindrical heat accumulating adapter sealed in housing near end of gas outlet. Novelty is that heater includes rod arranged along axis of heat accumulating adapter, supporting grid and cylindrical gas-tight casing. Heat accumulating member of adapter is made of thin corrugated strip whose one end is secured to rod. Corrugated strip is twisted around rod in the form of compact coil arranged together with supporting grid in casing. Height of strip corrugation is equal to thickness of strip.

EFFECT: improved design of heater due to its lowered hydraulic resistance.

1 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to heat exchange devices used for heat or cold transfer in the processes using liquid or gas flows, and can be used in heating and ventilation systems, in chemical, food and other industries. Heat exchange method in gaseous and liquid media consists in transfer of heat or warm liquid (gas) from upper layers of medium to lower ones by means of capsules consisting of cover with heat insulation in which there is tank filled with heat-absorbing material or liquid (gas) and flotation chambers with movable partition brought into operation with temperature drive in the form of bi-material. Capsules are retained on bottom till heat transfer is completed owing to magnet or thermomagnetic material installed in capsule, and electric magnet installed in lower layers; at that, current for electric magnet is generated when capsule with magnet passes along current-conducting spiral located along capsule movement.

EFFECT: proposed invention will allow, by using internal heat, performing heat exchange between upper and lower layers of liquid (gas), as well as producing electric power.

5 cl, 8 dwg

FIELD: heating systems.

SUBSTANCE: invention is intended for water heating and can be used in power engineering. Device includes boiler, expansion tank, heat exchanger, hydraulic air heat exchanger, pipelines, including pipeline connecting the upper part of boiler to the bottom of expansion tank, safety valves, capacity and tank. Boiler, tank, expansion tank and pipeline connecting the upper part of boiler to bottom of expansion tank have common longitudinal axis in vertical plane, heat exchanger and capacity are coaxial, and their axis is parallel to axes of tank, pipeline connecting the upper part of boiler to bottom of expansion tank and expansion tank; at that, heat exchanger is connected through the cock to pipeline connecting the upper part of boiler to bottom of expansion tank; in space between boiler internal walls and external walls there located are heat energy sources and heat-accumulating matters.

EFFECT: invention provides use of heat of phase transition of heat-accumulating matter.

1 dwg

Heat exchanger // 2425297

FIELD: power industry.

SUBSTANCE: heat exchanger includes casing with through openings on its opposite sides, phase transient working medium and heat carrier. Phase transient working medium is made in the form of frameless heat exchange elements from form-stable composite heat accumulating material, which are fixed inside casing with possibility of their being freely streamlined with heat carrier. In order to improve heat carrier to the space between adjacent heat exchange elements, elastic corrugated metal ribbed plates are installed. When using the heat exchanger as electric heating device, electric heaters are added to its composition.

EFFECT: improving mass and dimensions parameters of heat exchange devices at simultaneous increase of their power capacity, simplifying the design, increasing energy saving level and improving energy characteristics of the systems operating in peak actuation modes.

5 cl, 5 dwg

FIELD: power engineering.

SUBSTANCE: invention relates to the field of power engineering, more specifically, to facilities for accumulation, storage and release or conversion of heat energy. The heat energy accumulator comprises at least one control element and a working body, providing for accumulation of thermal energy and capable of releasing thermal energy as a result of action of at least one control element. At the same time according to the invention, the working body represents amorphous particles of refractory material, providing for accumulation of thermal energy when in condition of metastable highly destabilised defect-saturated condensed phase and release of thermal energy during phase transition from the defect-saturated destabilised condensed condition into condition of crystalline order.

EFFECT: proposed accumulator has higher energy intensity in comparison with analogues available at the current level of engineering.

5 cl, 1 dwg

FIELD: heating.

SUBSTANCE: invention relates to power engineering and can be used for heating and temperature control. An electric heat accumulating heater comprises a casing, heat accumulating substance and an electric heater connected to a power supply source. Novelty is that the electric heater is made as a conductive layer interacting with a movable electrode and comprising carbon nanomaterial above which a heat accumulating dielectric layer is provided. The device is characterised by highly efficient heat accumulation and possibility of changing the power with the step of 2 W and a wide control range from 10 W to 20 W.

EFFECT: invention allows for reduced power losses and increased heating rate control efficiency.

4 cl, 1 dwg

FIELD: heating.

SUBSTANCE: in a combined thermal storage electric heater with stage heating of the heat-storing core in the latter, a heat sensor is installed on one of the electric heating elements. It allows to set and control the temperature of the electric heating elements, heating them up according to the stage heating principle and not exceeding their maximum allowed temperature. There is a two-layer heat insulation with a shield between the layers of heat insulation inside the chamber with the heat-storing core. And there is a mixing chamber in the chamber with an electric convector. The mixing chamber allows mixing the flows of cold and hot air to a homogeneous state at the outlet of the device. There is an air gap between the bottom wall of the device case and the floor.

EFFECT: high heat efficiency with the ability to set and control the required temperature of electric heating elements installed inside the heat-storing core, mix the cold and hot air flows to a homogeneous state at the outlet of the device.

1 dwg

FIELD: heating system.

SUBSTANCE: device (100) of heat accumulation includes the first tank (10), the second tank (20), which is located above the first tank (10), two-position valve (30) and heat accumulating solution (40), which is placed in the first water tank (10) and the second tank (20). Heat accumulating solution (40) can absorb heat and be divided into first liquid and second liquid, having a lower density than the first liquid, when the lower critical temperature of solution or above it. The first liquid and the second liquid are capable of releasing heat when mixed with each other at a lower critical temperature of the solution. When the heat accumulting solution (40) is separated into the first liquid and the second liquid, the first liquid is placed in the first tank (10), and the second liquid is placed in the second tank (20).

EFFECT: invention allows the use latent heat accumulation device and a chemical reaction heat accumulation device.

7 cl, 1 tbl, 8 dwg

Up!